Bug 101580 - X hangs after turning monitor off and on
Summary: X hangs after turning monitor off and on
Status: RESOLVED MOVED
Alias: None
Product: xorg
Classification: Unclassified
Component: Server/General (show other bugs)
Version: git
Hardware: Other All
: medium normal
Assignee: Xorg Project Team
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-06-24 20:26 UTC by Paul Menzel
Modified: 2018-12-13 22:37 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:


Attachments
Messages from `/var/log/gdm/:0.log.2` (rotated after `systemctl restart gdm.service`) (38.58 KB, text/plain)
2017-06-24 20:26 UTC, Paul Menzel
no flags Details

Description Paul Menzel 2017-06-24 20:26:50 UTC
Created attachment 132224 [details]
Messages from `/var/log/gdm/:0.log.2` (rotated after `systemctl restart gdm.service`)

With Linux 4.11.6, X.Org Server 1.19.3, libevdev 1.5.7 and xf86-input-evdev 2.10.5 I have the strange behavior, that turning off the monitor and turning it back on, the keyboard stops working. The mouse still works. Restarting GDM with `systemctl restart gdm.service` fixes the issue. This happens when in the GDM login screen and when being logged in.

Unfortunately, I do not see anything in the log files. Please find the log attached.
Comment 1 Peter Hutterer 2017-06-26 01:01:05 UTC
two things to track this down: run sudo evemu-record against the keyboard and turn off the monitor. Check if it still records keyboard events when the keyboard seems to stop in the session. If it does, then it's a kernel issue.

run xinput watch-props "device name" for the keyboard device, check if the keyboard gets disabled at the X level on monitor turn off. If it does, then it's an issue with gnome-shell.

Does *anything* work with the keyboard when it's dead? VT-switch with ctrl+alt-F3 maybe? If vt-switching work, it could be a stuck grab.
Comment 2 Paul Menzel 2017-06-26 15:44:15 UTC
Thank you very much for your response with all the helpful suggestions.

There are two input devices created from the keyboard.

```
kernel: [    2.844582] input: Fujitsu Fujitsu Keyboard as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/0003:0BF8:101E.0001/input/input8
kernel: [    2.896919] hid-generic 0003:0BF8:101E.0001: input,hidraw0: USB HID v1.10 Keyboard [Fujitsu Fujitsu Keyboard] on usb-0000:00:14.0-7/input0
kernel: [    2.905922] input: Fujitsu Fujitsu Keyboard as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.1/0003:0BF8:101E.0002/input/input9
kernel: [    2.958891] hid-generic 0003:0BF8:101E.0002: input,hidraw1: USB HID v1.10 Device [Fujitsu Fujitsu Keyboard] on usb-0000:00:14.0-7/input1
```

That’s also listed here.

```
$ sudo ./evemu-record
Available devices:
/dev/input/event0:      Power Button
/dev/input/event1:      Power Button
/dev/input/event2:      HDA Intel PCH Front Mic
/dev/input/event3:      HDA Intel PCH Rear Mic
/dev/input/event4:      HDA Intel PCH Line
/dev/input/event5:      HDA Intel PCH Line Out
/dev/input/event6:      HDA Intel PCH Front Headphone
/dev/input/event7:      HDA Intel PCH HDMI/DP,pcm=3
/dev/input/event8:      Fujitsu Fujitsu Keyboard
/dev/input/event9:      Fujitsu Fujitsu Keyboard
/dev/input/event10:     Logitech USB Optical Mouse
/dev/input/event11:     Video Bus
Select the device event number [0-11]: 8 
# EVEMU 1.3
# Kernel: 4.11.6.mx64.160
# DMI: dmi:bvnFUJITSU//AmericanMegatrendsInc.:bvrV5.0.0.11R1.13.0forD3401-A1x:bd02/19/2016:svnFUJITSU:pnESPRIMO_P756:pvr:rvnFUJITSU:rnD3401-A1:rvrS26361-D3401-A1:cvnFUJITSU:ct6:cvrC$WX05:
# Input device name: "Fujitsu Fujitsu Keyboard"
# Input device ID: bus 0x03 vendor 0xbf8 product 0x101e version 0x110
[…]
```

`evemu-record` started in a GNU Screen session still shows events, but these are not shown on the screen.

That showed, that the X session hangs for some reason. I was confused, because the mouse still worked. But I am unable to open a menu or drag windows around. So it looks like a different issue.

It looks like, the issue only happens on a system with an Intel graphics device.  It works with AMD graphics devices (amdgpu) and NVIDIA devices (proprietary driver).

It be awesome, if you could tell me which component I should report that too. Probably the modesetting driver?
Comment 3 Paul Menzel 2017-06-26 16:31:37 UTC
```
$ more /proc/version
Linux version 4.11.6.mx64.160 (root@luxuria.molgen.mpg.de) (gcc version 5.3.0 (GCC) ) #1 SMP Mon Jun 19 11:49:25 CEST 2017
$ lspci -v -s 0:02.0
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 530 (rev 06) (prog-if 00 [VGA controller])
	Subsystem: Fujitsu Technology Solutions Device 121c
	Flags: bus master, fast devsel, latency 0, IRQ 124
	Memory at f6000000 (64-bit, non-prefetchable) [size=16M]
	Memory at e0000000 (64-bit, prefetchable) [size=256M]
	I/O ports at f000 [size=64]
	[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
	Capabilities: <access denied>
	Kernel driver in use: i915
	Kernel modules: i915
```

In the trace below, the process started from `/usr/libexec/Xorg` has the PID 7404, and the running GNOME Terminal has 7469.

```
[…]
7404  open("/sys/devices/virtual/tty/ptyp9/uevent", O_RDONLY|O_CLOEXEC) = 26
7404  fstat(26, {st_mode=S_IFREG|0644, st_size=4096, ...}) = 0
7404  read(26, "MAJOR=2\nMINOR=9\nDEVNAME=ptyp9\n", 4096) = 30
7404  read(26, "", 4096)                = 0
7404  close(26)                         = 0
7404  readlink("/sys/devices/virtual/tty/ptyp9/subsystem", "../../../../class/tty"..., 1024) = 21
7404  lstat("/dev/.udev/db/tty:ptyp9", {st_mode=S_IFLNK|0777, st_size=14, ...}) = 0
7404  readlink("/dev/.udev/db/tty:ptyp9", "ptyp9 char/2:9", 1024) = 14
7404  lstat("/dev/.udev/db/tty:ptyp9", {st_mode=S_IFLNK|0777, st_size=14, ...}) = 0
7404  readlink("/dev/.udev/db/tty:ptyp9", "ptyp9 char/2:9", 1024) = 14
7404  lstat("/dev/.udev/db/tty:ptyp9", {st_mode=S_IFLNK|0777, st_size=14, ...}) = 0
7404  readlink("/dev/.udev/db/tty:ptyp9", "ptyp9 char/2:9", 1024) = 14
7404  lstat("/dev/.udev/db/tty:ptyp9", {st_mode=S_IFLNK|0777, st_size=14, ...}) = 0
7404  readlink("/dev/.udev/db/tty:ptyp9", "ptyp9 char/2:9", 1024) = 14
7404  lstat("/dev/.udev/db/tty:ptyp9", {st_mode=S_IFLNK|0777, st_size=14, ...}) = 0
7404  readlink("/dev/.udev/db/tty:ptyp9", "ptyp9 char/2:9", 1024) = 14
7404  readlink("/sys/devices/virtual/tty/ptypa", 0x7fffadf8bf90, 1024) = -1 EINVAL (Invalid argument)
7404  stat("/sys/devices/virtual/tty/ptypa/uevent", {st_mode=S_IFREG|0644, st_size=4096, ...}) = 0
7404  open("/sys/devices/virtual/tty/ptypa/uevent", O_RDONLY|O_CLOEXEC) = 26
7404  fstat(26, {st_mode=S_IFREG|0644, st_size=4096, ...}) = 0
7404  read(26, "MAJOR=2\nMINOR=10\nDEVNAME=ptypa\n", 4096) = 31
[…]
7404  ioctl(12, 0xc0086457, 0x7fffadf8ca50) = 0
7404  ioctl(12, 0xc00c6466, 0x7fffadf8ca50) = 0
7404  ioctl(12, 0x400c645f, 0x7fffadf8c9f0) = 0
7404  ioctl(12, 0xc01864b1, 0x7fffadf8cb60) = 0
7404  epoll_wait(3, {{EPOLLIN, {u32=18498528, u64=18498528}}, {EPOLLIN, {u32=20817424, u64=20817424}}}, 256, 111635) = 2
7404  recvmsg(14, {msg_name(12)={sa_family=AF_NETLINK, pid=-990297710, groups=00000002}, msg_iov(1)=[{"libudev\0\376\355\312\376(\0\0\0(\0\0\0\324\0\0\0\26fAy\34\246T\36"..., 8192}], msg_controllen=32, {cmsg_len=28, cmsg_level=SOL_SOCKET, cmsg_type=SCM_CREDENTIALS{pid=1863, uid=0, gid=0}}, msg_flags=0}, 0) = 252
7404  recvmsg(14,  <unfinished ...>
7469  <... poll resumed> )              = 0 (Timeout)
7469  recvmsg(3, 0x7ffc06670690, 0)     = -1 EAGAIN (Resource temporarily unavailable)
7469  poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=8, events=POLLIN|POLLPRI}, {fd=10, events=POLLIN|POLLPRI}, {fd=11, events=POLLIN|POLLPRI}, {fd=12, events=POLLIN|POLLPRI}], 6, 0) = 0 (Timeout)
7469  poll([{fd=3, events=POLLIN|POLLOUT}], 1, 4294967295) = 1 ([{fd=3, revents=POLLOUT}])
7469  writev(3, [{"5\30\4\0x\0\300\0\36\0\300\0\r\0\24\0\212\4\6\0y\0\300\0x\0\300\0*\0\0\0"..., 156}, {NULL, 0}, {"", 0}], 3) = 156
7469  recvmsg(3, 0x7ffc06670680, 0)     = -1 EAGAIN (Resource temporarily unavailable)
7469  recvmsg(3, 0x7ffc06670690, 0)     = -1 EAGAIN (Resource temporarily unavailable)
7469  poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=8, events=POLLIN|POLLPRI}, {fd=10, events=POLLIN|POLLPRI}, {fd=11, events=POLLIN|POLLPRI}, {fd=12, events=POLLIN|POLLPRI}, {fd=13, events=POLLIN}], 7, 600) = 0 (Timeout)
```

The traces from GNOME Terminal only appear after moving the mouse cursor above it, but nothing can be done.
Comment 4 Paul Menzel 2017-06-27 09:33:37 UTC
Here are the verbose i915 messages when turning the monitor off.

```
kernel: [ 1324.650050] [drm:intel_get_hpd_pins [i915]] hotplug event received, stat 0x00400000, dig 0x10101210, pins 0x00000040
kernel: [ 1324.650058] [drm:intel_hpd_irq_handler [i915]] digital hpd port C - long
kernel: [ 1324.650065] [drm:intel_hpd_irq_handler [i915]] Received HPD interrupt on PIN 6 - cnt: 0
kernel: [ 1324.650076] [drm:intel_dp_hpd_pulse [i915]] got hpd irq on port C - long
kernel: [ 1324.650084] [drm:i915_hotplug_work_func [i915]] running encoder hotplug functions
kernel: [ 1324.650091] [drm:i915_hotplug_work_func [i915]] Connector DP-1 (pin 6) received hotplug event.
kernel: [ 1324.650099] [drm:intel_dp_detect [i915]] [CONNECTOR:52:DP-1]
kernel: [ 1324.650126] [drm:i915_hotplug_work_func [i915]] [CONNECTOR:52:DP-1] status updated from connected to disconnected
kernel: [ 1324.650133] [drm:i915_hotplug_work_func [i915]] Connector HDMI-A-2 (pin 6) received hotplug event.
kernel: [ 1324.650140] [drm:intel_hdmi_detect [i915]] [CONNECTOR:56:HDMI-A-2]
kernel: [ 1324.651666] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK for addr: 0050 w(1)
kernel: [ 1324.651674] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK on first message, retry
kernel: [ 1324.653666] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK for addr: 0050 w(1)
kernel: [ 1324.653669] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpc
kernel: [ 1324.655643] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK for addr: 0040 w(1)
kernel: [ 1324.655650] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK on first message, retry
kernel: [ 1324.657693] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK for addr: 0040 w(1)
kernel: [ 1324.657696] [drm:drm_dp_dual_mode_detect] DP dual mode HDMI ID:  (err -6)
kernel: [ 1324.657945] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:47:HDMI-A-1]
kernel: [ 1324.657953] [drm:intel_hdmi_detect [i915]] [CONNECTOR:47:HDMI-A-1]
kernel: [ 1324.659635] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpb] NAK for addr: 0050 w(1)
kernel: [ 1324.659643] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpb] NAK on first message, retry
kernel: [ 1324.661670] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpb] NAK for addr: 0050 w(1)
kernel: [ 1324.661672] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
kernel: [ 1324.663598] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpb] NAK for addr: 0040 w(1)
kernel: [ 1324.663605] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpb] NAK on first message, retry
kernel: [ 1324.665628] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpb] NAK for addr: 0040 w(1)
kernel: [ 1324.665630] [drm:drm_dp_dual_mode_detect] DP dual mode HDMI ID:  (err -6)
kernel: [ 1324.665632] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:47:HDMI-A-1] disconnected
kernel: [ 1324.665642] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:52:DP-1]
kernel: [ 1324.665651] [drm:intel_dp_detect [i915]] [CONNECTOR:52:DP-1]
kernel: [ 1324.665673] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:52:DP-1] disconnected
kernel: [ 1324.665719] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:56:HDMI-A-2]
kernel: [ 1324.665747] [drm:intel_hdmi_detect [i915]] [CONNECTOR:56:HDMI-A-2]
kernel: [ 1324.667594] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK for addr: 0050 w(1)
kernel: [ 1324.667601] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK on first message, retry
kernel: [ 1324.669604] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK for addr: 0050 w(1)
kernel: [ 1324.669622] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpc
kernel: [ 1324.671599] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK for addr: 0040 w(1)
kernel: [ 1324.671606] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK on first message, retry
kernel: [ 1324.673602] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK for addr: 0040 w(1)
kernel: [ 1324.673604] [drm:drm_dp_dual_mode_detect] DP dual mode HDMI ID:  (err -6)
kernel: [ 1324.673606] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:56:HDMI-A-2] disconnected
kernel: [ 1324.673612] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:58:DP-2]
kernel: [ 1324.673619] [drm:intel_dp_detect [i915]] [CONNECTOR:58:DP-2]
kernel: [ 1324.673640] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:58:DP-2] disconnected
kernel: [ 1324.673644] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:62:HDMI-A-3]
kernel: [ 1324.673650] [drm:intel_hdmi_detect [i915]] [CONNECTOR:62:HDMI-A-3]
kernel: [ 1324.675592] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpd] NAK for addr: 0050 w(1)
kernel: [ 1324.675599] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpd] NAK on first message, retry
kernel: [ 1324.677583] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpd] NAK for addr: 0050 w(1)
kernel: [ 1324.677586] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpd
kernel: [ 1324.679640] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpd] NAK for addr: 0040 w(1)
kernel: [ 1324.679648] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpd] NAK on first message, retry
kernel: [ 1324.681635] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpd] NAK for addr: 0040 w(1)
kernel: [ 1324.681637] [drm:drm_dp_dual_mode_detect] DP dual mode HDMI ID:  (err -6)
kernel: [ 1324.681639] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:62:HDMI-A-3] disconnected
kernel: [ 1324.681646] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:64:DP-3]
kernel: [ 1324.681653] [drm:intel_dp_detect [i915]] [CONNECTOR:64:DP-3]
kernel: [ 1324.681675] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:64:DP-3] disconnected
```

Now the messages, when turning it back on.

```
kernel: [ 1331.449722] usb 1-8: USB disconnect, device number 5
kernel: [ 1332.749718] [drm:intel_get_hpd_pins [i915]] hotplug event received, stat 0x00400000, dig 0x10101210, pins 0x00000040
kernel: [ 1332.749726] [drm:intel_hpd_irq_handler [i915]] digital hpd port C - long
kernel: [ 1332.749733] [drm:intel_hpd_irq_handler [i915]] Received HPD interrupt on PIN 6 - cnt: 0
kernel: [ 1332.749743] [drm:intel_dp_hpd_pulse [i915]] got hpd irq on port C - long
kernel: [ 1332.749752] [drm:i915_hotplug_work_func [i915]] running encoder hotplug functions
kernel: [ 1332.749759] [drm:i915_hotplug_work_func [i915]] Connector DP-1 (pin 6) received hotplug event.
kernel: [ 1332.749766] [drm:intel_dp_detect [i915]] [CONNECTOR:52:DP-1]
kernel: [ 1332.749793] [drm:i915_hotplug_work_func [i915]] Connector HDMI-A-2 (pin 6) received hotplug event.
kernel: [ 1332.749800] [drm:intel_hdmi_detect [i915]] [CONNECTOR:56:HDMI-A-2]
kernel: [ 1332.750582] [drm:intel_get_hpd_pins [i915]] hotplug event received, stat 0x00400000, dig 0x10101110, pins 0x00000040
kernel: [ 1332.750590] [drm:intel_hpd_irq_handler [i915]] digital hpd port C - short
kernel: [ 1332.750602] [drm:intel_dp_hpd_pulse [i915]] got hpd irq on port C - short
kernel: [ 1332.750991] [drm:intel_dp_read_dpcd [i915]] DPCD: 11 0a a4 01 01 00 01 81 00 00 00 00 00 00 00
kernel: [ 1332.751502] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK for addr: 0050 w(1)
kernel: [ 1332.751510] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK on first message, retry
kernel: [ 1332.751882] [drm:intel_dp_check_link_status [i915]] DDI C: channel EQ not ok, retraining
kernel: [ 1332.752235] [drm:intel_get_hpd_pins [i915]] hotplug event received, stat 0x00400000, dig 0x10101110, pins 0x00000040
kernel: [ 1332.752242] [drm:intel_hpd_irq_handler [i915]] digital hpd port C - short
kernel: [ 1332.752782] [drm:intel_dp_set_signal_levels [i915]] Using signal levels 00000000
kernel: [ 1332.752790] [drm:intel_dp_set_signal_levels [i915]] Using vswing level 0
kernel: [ 1332.752797] [drm:intel_dp_set_signal_levels [i915]] Using pre-emphasis level 0
kernel: [ 1332.752804] [drm:intel_dp_program_link_training_pattern [i915]] Using DP training pattern TPS1
kernel: [ 1332.753502] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK for addr: 0050 w(1)
kernel: [ 1332.753504] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpc
kernel: [ 1332.754465] [drm:intel_dp_start_link_train [i915]] clock recovery OK
kernel: [ 1332.754472] [drm:intel_dp_program_link_training_pattern [i915]] Using DP training pattern TPS2
kernel: [ 1332.755551] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK for addr: 0040 w(1)
kernel: [ 1332.755559] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK on first message, retry
kernel: [ 1332.756430] [drm:intel_dp_start_link_train [i915]] Channel EQ done. DP Training successful
kernel: [ 1332.757560] [drm:gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK for addr: 0040 w(1)
kernel: [ 1332.757562] [drm:drm_dp_dual_mode_detect] DP dual mode HDMI ID:  (err -6)
kernel: [ 1332.783257] [drm:intel_dp_hpd_pulse [i915]] got hpd irq on port C - short
kernel: [ 1332.783646] [drm:intel_dp_read_dpcd [i915]] DPCD: 11 0a a4 01 01 00 01 81 00 00 00 00 00 00 00
kernel: [ 1332.979479] usb 1-8: new low-speed USB device number 6 using xhci_hcd
kernel: [ 1333.153366] input: Logitech USB Optical Mouse as /devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.0/0003:046D:C077.0006/input/input14
kernel: [ 1333.153734] hid-generic 0003:046D:C077.0006: input,hidraw2: USB HID v1.11 Mouse [Logitech USB Optical Mouse] on usb-0000:00:14.0-8/input0
```
Comment 5 Paul Menzel 2017-11-16 06:22:16 UTC
By the way, that only happens with a monitor connected over DisplayPort. I wonder what udev does differently there.
Comment 6 Paul Menzel 2018-02-26 15:27:49 UTC
This happens with the modesetting driver and amdgpu too. So it looks like a general problem with X and older udev versions, at least udev 164.
Comment 7 Mez 2018-03-24 12:47:27 UTC
I can confirm it happens with amdgpu in various kernels I've been using in the last year or so.

The outcome is very random, either crashes my system or logs me out of Gnome.

Radeon RX 560 card is tied via HDMI to an AV receiver (audio then sent to speakers and video to a TV screen via HDMI)

3 possibilities of having this happen: 
- if the screen goes blank when idle, might hang X or crash the system (already filed)
- when I manage to deactivate all lock screens or screensavers (in buggy Gnome), if I just turn the TV off, have a nap and back on, Gnome will be at log in screen, with previous session terminated. Or system hangs. (filed here)
- When switching input channel of the AV receiver for a different source and then back, X or system hangs (not filed yet but probably linked).

Also, display settings of Gnome detect a Pioneer 7" screen (AV receiver LCD?) instead of a 32". On Ubuntu 17.04" with Unity, I had none of these problems.

I can't figure out if the problem comes from amdgpu, X or Gnome (as Gnome absolutely sucks at dealing with displays, lock screens and screensavers).

I'm sure this is just one big issue leading to all of these.
Comment 8 GitLab Migration User 2018-12-13 22:37:54 UTC
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/xorg/xserver/issues/521.


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